Now that I think about it some more, this is a problem that WinFS could really help to solve. The biggest reason that people don't use things like RDF is sheer laziness (you'll notice the rich RDF on my site ) but if we can use the Longhorn interface to easily enter and organize metadata about content, it might be a cool way to generate RDF or other semantic information. Hmmmm... It would be fun to write a WinFS -> RDF widget. If it wasn't for that dang day job...